Either the stand-alone dump program dumped itself — a self-dump —, or the operator loaded another stand-alone dump program to dump the failed stand-alone dump program.
The stand-alone dump program and the stand-alone dump together form what is known as the stand-alone dump service aid. The term stand-alone means that the dump is performed separately from normal system operations and does not require the system to be in a condition for normal operation.
The stand-alone dump program produces a high-speed, unformatted dump of central storage and parts of paged-out virtual storage on a tape device or a direct access storage device (DASD). The stand-alone dump program, which you create, must reside on a storage device that can be used to IPL.
Produce a stand-alone dump when the failure symptom is a wait state with a wait state code, a wait state with no processing, an instruction loop, or slow processing.
You can create different versions of the stand-alone dump program to dump different types and amounts of storage. To create the different versions, code several AMDSADMP macros by varying the values of keywords on the macros.